Sagot :
a) 2x = 5
x = 5/2
b) -3y = 6
y = 6/-3
y = -2
c) x/2 = 5
x = 10
d) 2a+ 7 = 1
2a = -6
a = -3
e) -4 = 6+5x
6+5x = -4
5x = -10
x = -2
f) 5- x = 8
- x = 8/5
x = -8/5
x = 5/2
b) -3y = 6
y = 6/-3
y = -2
c) x/2 = 5
x = 10
d) 2a+ 7 = 1
2a = -6
a = -3
e) -4 = 6+5x
6+5x = -4
5x = -10
x = -2
f) 5- x = 8
- x = 8/5
x = -8/5
2x=5
x=5/2
-3y=6
-y=6/3
y=-6/3
y=-2
x/2=5
x=5*2
x=10
2a+7=1
2a=1-7
2a=-6
a=-6/2
a=-3
-4=6+5x
-4-6=5x
-10=5x
-10/5=x
-2=x
x=-2
5-x=8
-x=8-5
-x=3
x=-3
x=5/2
-3y=6
-y=6/3
y=-6/3
y=-2
x/2=5
x=5*2
x=10
2a+7=1
2a=1-7
2a=-6
a=-6/2
a=-3
-4=6+5x
-4-6=5x
-10=5x
-10/5=x
-2=x
x=-2
5-x=8
-x=8-5
-x=3
x=-3